Comparison of Noninvasive Testing Modalities in the Assessment of Peripheral Arterial Hemodynamics Following Vascular Interventional Procedures
Price, Julie L.
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Vascular medicine and surgery have recently seen the development of new noninvasive diagnostic modalities and interventional techniques. A magnetic resonance blood flowmeter (MRF) has been developed to quantitate peripheral arterial blood flow and the amount of blood perfusing within the tissue. Color duplex imaging (CDI) is also being used to provide physiologic as well as anatomic information about the vasculature. Should blood flow be diminished, new interventional procedures such as balloon and laser assisted angioplasty have been developed to repair an occluded or stenosed artery. A study was undertaken to assess the validity of these new testing modalities in addition to comparing the success rates of endovascular procedures to the currently accepted standard of bypass surgery. Patients were screened with conventional vascular laboratory tests, the MRF, and the CDI before and following an interventional procedure. Traditional vascular laboratory measurements and MRF absolute volume flow data were found to be inadequate in differentiating successful from failed or failing interventional procedures. MRF limb perfusion values, expressed as milliliters of flow/minute/I00 cc of tissue appeared to be a sensitive indicator of patency. Further investigation is needed before any significant conclusions may be made regarding the long term patency of the endovascular pocedures.